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7212754 |
Image forming apparatus forming an image by thermally fixing a developed image
When a state, in which the temperature detected by a thermistor for detecting the temperature of a heating roller does not increase, is continued for 15 seconds, even though the printing operation...
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7212759 |
Heating device, fixing device and image forming apparatus
A heating device, a fixing device and an image forming device are disclosed for making the life-span of a capacitor thereof longer. The heating device includes a heating part having at least one...
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7212760 |
Image forming apparatus performing improved fixing temperature control
An electrophotographic image forming apparatus includes a device to set a temperature correspondence electrifying duty ratio relative to a fixing heater of a fixing device according to a detected...
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7206533 |
Method for controlling fusing temperature and blower speed based on toner coverage computed from data to be printed and apparatus using the same
A method for controlling the fusing temperature and blower speed based on toner coverage computed from data to be printed and apparatuses using the same. The apparatus for controlling a fusing...
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7203438 |
Image heating apparatus and heater for use therein
Image heating apparatus capable of preventing an excessive temperature increase in a sheet non-passing area and heater for use in the image heating apparatus including: a substrate, a heat...
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7203437 |
Fixing apparatus and image forming apparatus
If the temperature T 1 of the middle part of a heat roller 2 is higher than the temperature T 2 of the end parts of the heat roller 2 [T 1 ≧(T 2 −X)], the operating time B of side coils ...
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7199335 |
Heat fusing apparatus, method of controlling same and image forming apparatus
Disclosed is a heat fusing apparatus for thermally fusing toner that has been transferred to a printing medium from a toner image formed on an image bearing member using an electrophotographic...
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7196286 |
Heating apparatus, auxiliary power supply apparatus, auxiliary power supply system, fixation apparatus, and moving picture formation apparatus
A heating device of the invention comprises a heater, a main power supply, and an auxiliary power supply. The heater includes a main heating element which generates heat with power supplied from...
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7193180 |
Resistive heater comprising first and second resistive traces, a fuser subassembly including such a resistive heater and a universal heating apparatus including first and second resistive traces
A resistive heater adapted for heating a fuser belt is provided. The heater comprises a substrate, a first resistive trace formed over the substrate, and a second resistive trace formed so as to at...
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7190915 |
Image forming apparatus with time interval control of fixing unit and control method therefor
An update value for updating a count value is changed in accordance with the time interval of activations of a fixing unit. Every time the fixing unit is activated, the count value is updated in...
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7190914 |
Image heating apparatus having heater for externally heating fixing roller
The image heating apparatus for heating a toner image formed on a recording material, includes a rotatable member; heating device for heating an outer peripheral surface of the rotatable member,...
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7189949 |
Power control system and method for regulating power provided to a heating device
A circuit includes a switching device for controlling a power signal to be applied to a heating device. A control circuit is configured for comparing a temperature signal, indicative of the...
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7187881 |
Image forming apparatus with heating unit control function
An image forming apparatus having a heating unit control function in accordance with the present invention energizes one of a plurality of heating units designated by a sequence counter to be...
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7187882 |
Image fusing device with power control and image forming apparatus with same
This invention is intended to control the amount of power to be supplied to a fusing heater below a maximum applicable current value. The engine controller supplies electricity to both of two...
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7187880 |
Thermal fixing device and image forming apparatus using the same
Disclosed is a thermal fixing device using at least two heaters for respectively heating center and end portions of a fixing member, in which after the driving of the two heaters is stopped,...
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7187878 |
Image forming apparatus and its control method
In continuous printing operation which repeatedly sets a state in which when a preceding printing material passes through the nip area of a thermal fixing unit, a succeeding printing material has...
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7187883 |
Image forming apparatus having fixing device with cooling device
An image forming apparatus includes a fixing device for fixing developer on a recording medium; a heating device for heating the fixing device; a cooling device for cooling the fixing device; a...
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7186956 |
Fuser-controlling apparatus for generating a power synchronization signal and detecting power voltage
A fuser-controlling apparatus for generating a power synchronization signal and detecting a power voltage. The fuser-controlling apparatus comprises a power synchronization signal generation...
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7184675 |
Fixing temperature control method and image forming apparatus with detection of thickness of a print medium
In an image forming apparatus which has a medium thickness detecting unit for detecting a thickness of print medium and forms an image by an electrophotographic process, the apparatus has a unit...
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7177560 |
Method of warming fixing device, method of determining humidity value used in image formation apparatus, and image formation apparatus
A method of warming a fixing device includes the steps of: providing a first fixing member and a second fixing member for fixing a toner image onto a sheet, a temperature increase rate of the first...
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7167660 |
Standby temperature control to minimize fuser droop and overshoot
A method of operating an electrophotographic printer and particularly the fuser thereof, includes preheating a heated roller of the fuser to a preheat temperature greater than the maximum target...
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7164869 |
Print delay based on media type
A laser printer ( 10 ) having a fuser ( 220 ) to fix toner on sheets ( 214 ) in which the fuser element ( 225 ) heated by the power supply ( 121 ) of the printer is not capable of drawing enough...
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7164870 |
Method and apparatus for image forming capable of effectively performing an image fixing
An image forming apparatus includes an image forming mechanism and an image fixing mechanism which includes a fixing member, a capacitor, a charger, a first heater, a second heater, a sensor, and a...
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7162175 |
Image forming apparatus including temperature sensor and method thereof
A fixing device for an image forming apparatus includes a heating roller and a press roller. The press roller is pressed against the heating roller, and the heating roller and the press roller...
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7154518 |
Pre-heating system usable with image forming device based on behavior profile of user and a method thereof
A pre-heating system usable with an image forming device based on a behavior profile of a user and a method thereof including sensing, according to time, program operation patterns of at least one...
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7151903 |
Method and apparatus for reducing surface temperature variation of an externally-heated fusing roller
Reducing variation in the surface temperature of an externally-heated fusing roller in an electrophotographic machine, the variation typically occurring during the beginning of a fusing run, by...
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7146116 |
Heat generating apparatus using electromagnetic induction
When a temperature control does not operate, and a thermal runaway state occurs, the temperatures of a heating roller and a thermostat rise rapidly. When the rise in the temperature occurs such...
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7146117 |
Method of controlling temperature of fuser of image forming apparatus
A method of controlling temperature of a fuser of an image forming apparatus includes measuring the temperature of the fuser, comparing the measured temperature with a previously measured...
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7142792 |
Fixing apparatus
The fixing apparatus prevents transfer paper from sticking or jamming. This fixing apparatus is intended to fix polymerized toner on transfer material and has a heating roller and a pressure...
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7142793 |
Xerographic fusing apparatus with a temperature-sensitive positioning mechanism for a heating element
An apparatus for fusing print sheets, such as in xerographic printing, comprises a heating element, and a temperature-sensitive mounting for the heating element. The mounting changes a position of...
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7139500 |
Image fusing device and image forming apparatus
This invention is intended to control the amount of power to be supplied to a fusing heater below a maximum applicable current value. The engine controller supplies electricity to both of two...
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7139495 |
Fixing apparatus and image forming apparatus
If a temperature of a heat roller 12 rises abnormally, a thermostat 54 operates. When the thermostat 54 operates, a conduction path to an excitation coil 91 of a relay 90 is cut off so...
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7139499 |
Induction heating type of fixing device and image forming apparatus equipped therewith
An induction heating type of fixing device to fix a recording material having a toner image thereon, having a heating member, an induction coil divided into a plurality of parts, a temperature...
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7136601 |
Fixing apparatus and image forming apparatus with temperature controller increasing electric power substantially at a timing with temperature degradation
In a fixing apparatus using a fixing belt having an elastic layer as a fixing member and an image forming apparatus mounting such a fixing apparatus thereto, before a temperature detecting unit...
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7130553 |
Heating apparatus with conveyance interval controller and control of electric power in conformity with detected temperature
An image forming apparatus having a fixing apparatus for nipping a recording material bearing an unfixed toner image on the surface thereof by a nip portion between a fixing member and a pressure...
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7130555 |
Fixing unit having a plurality of heaters, image forming apparatus and method of determining temperature detecting position of temperature sensor
A fixing unit thermally fixes a toner on a recording medium by a fixing member having a plurality of internal heaters and an outer peripheral surface, and a temperature sensor detects a surface...
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7130554 |
Power supply for a first and second heating elements in image forming apparatus with control based on detected temperature at start
The present invention provides an image forming apparatus including, a heating member heating an image on a recording material having a first exothermic element in which the calorific value of the...
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7130556 |
Fixing unit
A fixing device of the present invention has first and second thermistors which detect the temperatures at predetermined positions in the longitudinally direction of a heating roller, first and...
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7127189 |
Heating unit, auxiliary power unit, fixing unit, and image forming apparatus
A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the...
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7122767 |
Method for controlling power supply to fixing roller in image forming apparatus
A fixing roller in an image forming apparatus (such as a copier) has a fixing heater that is supplied power from a capacitor. The fixing heater, the capacitor, a mechanical switch (such as a relay)...
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7120370 |
Image forming apparatus
In a duplex printing or a simplex printing, upper and lower rollers of a fixing unit are separated from each other or stop rotating during a period after the fixing operation of the first side of a...
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7116923 |
Fuser provided with auxiliary power supply device to operate with varying power
An apparatus for fusing toner with a sheet includes an electricity storage device, a heating unit configured to generate heat based on electric power supplied from the electricity storage device, a...
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7113716 |
Wrinkle prevented thermal fixing device and image forming apparatus
A thermal fixing device includes: a fixing member configured to be in contact with a fixation medium; a first pressing member disposed to face the fixing member and presses the fixation medium to...
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7113719 |
Image forming apparatus
An image forming apparatus operable to perform functions. The functions include a function involving a printing operation. The apparatus includes an activator for activating a function. A...
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7110690 |
Image forming apparatus and method of controlling a heating unit
An image forming apparatus according to an embodiment of the present invention can suppress overshoot by shifting the OFF timing of the central heater lamp from that of the end heater lamp or the...
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7109440 |
Fusing system of image forming apparatus and temperature control method thereof
A fusing system for use in an image forming apparatus has a fusing temperature control unit having a controller which controls the surface temperature ‘T’ of the fusing roller by detecting the...
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7110691 |
Image forming apparatus
An image forming apparatus has a plurality of image forming units (R 1 –R 4 ) for forming toner images, a fixing unit ( 63 ) for fixing the tone image to a medium, and a temperature control unit...
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7107001 |
Fixing apparatus with controlled heating members for heating the outer surface of the fixing rotating member
The present invention provides an external heating member abutment controller which can instantaneously adjust the quantity of heat provided by external heating members to the surface of a fixing...
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7106986 |
Fixing apparatus
A fixing apparatus of an image forming apparatus with high productivity for heavy paper is provided that prevents an abnormal temperature rise of a heated material after a continuous printing...
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7106987 |
Fixing device and image forming apparatus
A fixing device has a magnetic field generator; an electric power supplier for electric power supply to the magnetic field generator; electric power controller for controlling an electric power...
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